نمونه حل مساله شیمی 2 فصل2

36:39

6:31

28:44

7:55

1:46

21:46

2:13

52:57

8:07

15:34

7:06

4:10

13:10

38:28

36:34

40:31

2:04

3:33

13:17

40:11

14:18

1:36

9:58

3:11

3:13

3:12

5:19

4:52

3:39

5:27

9:12

26:43

9:18

32:18

7:29

25:22

19:26

19:51

4:20

6:03